package com.hmdp.utils;



import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.判断是否需要拦截(ThreadLocal中是否有用户)
        if (UserHolder.getUser() == null) {
            //没有，需要拦截
            response.setStatus(401);
            return false;
        }
        //有用户，则放行
        return true;
    }

}
